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Finding the Fourth Proportional to 210,545.02, 315,867.10 and 68,389.85

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Solution

The fourth proportional to 210,545.02, 315,867.10 and 68,389.85 is: 102,600.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,545.02 : 315,867.10 = 68,389.85 : x
  2. Step 2: Convert to fraction form
    210,545.02/315,867.10 = 68,389.85/x
  3. Step 3: Cross multiply
    210,545.02x = 315,867.10 × 68,389.85
  4. Step 4: Simplify right side
    210,545.02x = 21,602,102,009.60
  5. Step 5: Solve for x
    x = 21,602,102,009.60/210,545.02
  6. Step 6: Final answer
    x = 102,600.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.